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Originally Posted by pokkeherrie
so how about giving me a refreshment course, alex?
it's been ages since i had that shit in school and i'm wondering about the solutions of those two problems.
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Probability: The likelyhood of an even happening represented with a number between 0 and 1.
The Dover children, Eileen and Ben, are away at college. They visit home on random weekends, Eileen with a probability of 0.2 and Ben with a Probablility of 0.25. What is the probability that both will visit.
The probability of them both visiting is the two probabilities multiplied. As in 1/5 X 1/4 = 1/20 = .05
There is a 5% chance that they will both visit.
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The Katz Brothers, Bob and Tom, are hiding in a cellar. If either one sneezes, they will reveal their hiding places and be found. Bob's probability of sneezing is 0.6 and Tom's probability is 0.7 What is the probability that at least one sneezes?
My teacher didn't fully explain why one method for this didn't work, so I may be leaving something out...
You need to find the probability of the opposite of at least one of them sneezing, meaning neither of them sneezing, then subtracting that from one in order to find the answer (finding one opposite and subtracting from 1 (essentially another oppoiste) brings you back to the original question).
So in this case, the chance of neither of them sneezing is .4 X .3 (since .6 and .7 is the chance of them sneezing, you subtract those from one to get the chance of them not sneezing). So the probability that neither of them will sneeze is .12. We take that number and subtract it from 1. The answer is .88 or 88%.
Wasn't that fun?
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Originally Posted by pantophobia
Algebra in 10th grade? shiiiiiiite, I had to take summer school to make up for failing it, and cause i dropped out after 10th, it took me til 11th grade to pass it
at my school back in 99, half of the grade failed Algebra, actual half of the 10th grades in the whole state failed it, while i think it should be made an elective, at least they could suspend it to at the very least the 11th grade to grasp it
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It is standard to take Algebra I in 8th grade in my school district. Geometry in 9th grade, and Algebra II in 10th. But there are plenty of people who take the classes later.
Next year I'm taking Math Analysis E (I could also be doing AP Statistics), and after that AP (hopefully) Calculus.